Coolpi 4b Ubuntu22.04 原生系统

大法师

Ubuntu22 原生系统测试版

Download link: 百度网盘 OneDrive

刷机操作请参考：
https://www.cool-pi.com/topic/126/coolpi-4b-镜像固件离线刷机方法

https://www.cool-pi.com/topic/127/coolpi-4b-镜像固件在线刷机方法

allen

在设置里面安装语言包，会提示包数据库损坏无法安装。而且登入登出或者息屏重新唤醒的时候有概率会出现鼠标消失的问题

jack_admin

@allen 下一版更新

zensation

i purchased the board with emmc and preinstalled ubuntu. i tried the usernam: coolpi and password: 123 and it does not work. what is the username and password

george

@zensation You can use the shell to log in, expand the partition capacity, and then try to log in from the UI interface.

zensation

@george i was trying to log in via com port but on serial connection. i didnt find it documented so anyone else that runs into the issue the username is ubuntu and the password is coolpi

george

@zensation If this is the case, it means that the image you are using is incorrect, or it is not successfully created.

zensation

@george its exactly correct based on other screenshots of the ubuntu 22.0.4 builds seen on here that also show a username of ubuntu and somewhere someone shared their password as coolpi. i was able to figure it out when i plugged in an hdmi cable. before that was just trying to access terminal through UART.

cbratschi

This post is deleted!

george

@allen 更新内核代码，已经解决了概率鼠标消失问题。
@cbratschi Add onedrive download link.

Twsuts

我在系统中使用想开机自启动一个QT程序，我沿用了树莓派的方法，在~/.profile文件中添加了我的启动路径，但是程序并没有像树莓派一样启动，传统的自启动程序会进入桌面再启动程序，效果会差很多时间也长很多，还有就是开机的动画能不能有个教程，如果太忙了就算了，希望能回答我第一个问题

大法师

@Twsuts
提供个demo与配置，我们测试下

Twsuts

@大法师配置就是在~/profile文件末尾加上 echo “coolpi” | sudo -S /home/coolpi/qt5/demo ,这是启动程序的命令，树莓派跟我以前用的ROCKPI正常是能启动程序的，在界面出来以前，你看到的效果就是黑屏然后直接进入了我们的程序，demo可以随便写一个QT demo，然后开机重启的时候看能不能在进入界面之前启动

大法师

@Twsuts
这是阻塞系统运行？还是后台运行作为开机动画？

我试了分别在/etc/profile、/home/coolpi/.profile文件尾增加qt demo是可以的

sudo apt install qtbase5-examples

coolpi@coolpi:~$ cat /etc/profile
# /etc/profile: system-wide .profile file for the Bourne shell (sh(1))
# and Bourne compatible shells (bash(1), ksh(1), ash(1), ...).

if [ "${PS1-}" ]; then
  if [ "${BASH-}" ] && [ "$BASH" != "/bin/sh" ]; then
    # The file bash.bashrc already sets the default PS1.
    # PS1='\h:\w\$ '
    if [ -f /etc/bash.bashrc ]; then
      . /etc/bash.bashrc
    fi
  else
    if [ "`id -u`" -eq 0 ]; then
      PS1='# '
    else
      PS1='$ '
    fi
  fi
fi

if [ -d /etc/profile.d ]; then
  for i in /etc/profile.d/*.sh; do
    if [ -r $i ]; then
      . $i
    fi
  done
  unset i
fi

#echo "coolpi" | sudo -S /usr/lib/aarch64-linux-gnu/qt5/examples/gui/analogclock/analogclock
coolpi@coolpi:~$

coolpi@coolpi:~$ cat ~/.profile 
# ~/.profile: executed by the command interpreter for login shells.
# This file is not read by bash(1), if ~/.bash_profile or ~/.bash_login
# exists.
# see /usr/share/doc/bash/examples/startup-files for examples.
# the files are located in the bash-doc package.

# the default umask is set in /etc/profile; for setting the umask
# for ssh logins, install and configure the libpam-umask package.
#umask 022

# if running bash
if [ -n "$BASH_VERSION" ]; then
    # include .bashrc if it exists
    if [ -f "$HOME/.bashrc" ]; then
        . "$HOME/.bashrc"
    fi
fi

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/.local/bin" ] ; then
    PATH="$HOME/.local/bin:$PATH"
fi

echo "coolpi" | sudo -S /usr/lib/aarch64-linux-gnu/qt5/examples/gui/analogclock/analogclock
coolpi@coolpi:~$

因为不是后台运行，重启后会阻塞桌面系统显示窗口。此时可以通过键盘ctrl+alt+f6切换到终端命令行进行恢复修改操作。

也可以后台运行测试

vim ~/.profile
...
echo "coolpi" | sudo -S /usr/lib/aarch64-linux-gnu/qt5/examples/gui/analogclock/analogclock &

Twsuts

@大法师感谢您的回答，您的操作看起来很正常，这样看来确实很奇怪，但我这边不论是ubuntu22还是ubuntu20我在.profile文件下启动我的qt程序都没反应，它会直接进入桌面，而在/etc/xdg/autostart/下可以自动启动我的应用程序，但是后者显示屏会出现几秒钟的ubuntu图形界面，这看起来很糟糕！

大法师

@Twsuts
百度网盘或onedrive有最新镜像，是否镜像不一致？

Twsuts

@大法师前天刚刷的最新镜像，甚至于我在使用ssh登陆时都能启动程序，终端登陆就会启动程序，但是显示屏上就是直接进入了桌面。

大法师

@Twsuts
是不是自动登陆设置打开了？

Twsuts

@大法师还真是的

Twsuts

@大法师关了也没用，换了一个最简单的demo也没用，我只能通过我原来的方法启动程序，然后把整个桌面服务关了试试看了，不过这样启动会慢很多

顾真牛

@Twsuts 看看登录服务用的是什么gdm还是LightDM，改那个的配置文件。不启动桌面启动你的QT程序

顾真牛

@Twsuts SSH能启动开机不启动，你看看是不是用户不一致

Twsuts

@顾真牛用户都是一样的coolpi，我现在解决了这个问题，在那之前加入export DISPLAY=:0 这样就可以启动了

Twsuts

@顾真牛 @大法师感谢你们的帮助